... of Parkinson's cases are not directly inherited. About 15 to 25 percent of people with Parkinson’s report having a relative with the disease. In large population studies, researchers have found that ...

... these features are similar to those seen in Parkinson’s disease, and early in the disease course it often may be difficult
to distinguish these disorders.
MSA is a rare disease, affecting potentially 15,000 to 50,000 Americans, including men and ...